1、8.6x74528 9x54486 x2.49.236x11x188 83(x9)1245 3.4x7.6(1)x2=2x ( )(2)含有未知数的式子就是方程。(3)aa2a ( )(4)x6是方程6x630的解。3.6x6.9 x3.51.7 x4.65.8x3.16.8 1x1 4.8x3.625.28x21619 7.4x93203 x1.97.314x62x684 15(x2)60 3.4x6.6(1)a2(2)含有未知数y的算式就是方程。(3)nn2n ( )(4)x9是方程5x1035的解。0.3x8.8 x9.68.8 x4.87x1.27.7 7.9x71.1 5.6x9.7
2、23.97.9x35518 8x26454 x2.56.276x65x846 36(x1)180 0.7x6.4(2)含有未知数的等式就是方程。(3)dd2d ( )(4)x9是方程3x720的解。1.5x6.1 x8.47 x4.75.1x28.9 9.2x84.64 5.4x7.635.69.4x92472 4.5x44136 x0.37.735x70x315 48(x3)336 4.5x9.2(1)m22m ( )(2)含有未知数的算式就是方程。(3)2b22(b1) ( )(4)x4是方程5x416的解。0.6x8.3 x4.55.7 x49.64.75.1 2.9x22.91 6.3
3、x0.356.48.3x66183 7.6x10294 x1.68.711x85x96 33(x8)330 2x8.2(2)含有未知数x的等式就是方程。(3)ss2s ( )(4)x9是方程6x252的解。3.1x9.8 x5.11.6 x3.26.8x3.78.5 7x58.8 6.8x641.69.9x85608 6.5x83177 x2.18.666x56x1098 36(x3)360 5x8.5(1)c22c ( )(3)mm2m ( )(4)x9是方程4x234的解。2.7x6.3 x9.49.6 x1.59.71.25.7 7.4x57.72 9.3x9.955.28.1x9963
4、0 4.2x32346 x2.76.17x3x60 10(x9)160 3.5x9.1(1)m2=2m ( )(2)含有未知数y的等式就是方程。(4)x5是方程5x718的解。3.9x8.1 x82.1 x2.76.7x2.55.2 8.3x29.05 5.1x3.632.17.8x36276 5x65285 x0.85.645x80x750 99(x1)990 3.4x7.2(1)d2(4)x6是方程7x438的解。3.7x9.8 x2.40.9 x3.59.4x1.85.7 8.5x45.05 7.6x6.254.65.7x30141 8.3x40541 x0.58.232x46x468
5、30(x9)480 4x7.9(4)x9是方程7x855的解。0.2x6.2 x36.4 x2.27.1x2.45.1 5.9x58.41 7.1x8.434.24x26174 7.7x85454 x0.4846x60x530 96(x5)864 4.1x7.8(1)t22y ( )(3)xx2x ( )(4)x8是方程4x626的解。4.8x9.6 x5.71.6 x4.791.16.1 5.9x45.43 4.5x9.58.58.8x54298 8.3x96568 x0.48.340x59x693 80(x7)640 2.3x8.9(3)ss2s ( )(4)x6是方程8x246的解。3.4x5.8 x7.81.3 x0.77.9x4.37 1.6x12 9.5x976.55.3x17301 8.1x20709 x2.85.55x26x124 74(x9)1036 4.6x6.1(2)含有x的等式就是方程。(3)nn2n ( )(4)x8是方程5x832的解。4.4x8.3 x9.32.8 x1.75.71.57.6 6.9x39.33 8.9
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